Kazuo Ohara
22Patents
13h-index
12Co-inventors
78Inventor score
Filing activity: Feb 7, 1974 → Dec 2, 2003
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6475677B1 | Glass-ceramic composite electrolyte and lithium secondary cell | Emerging Cross-Sectional Technologies | 74 | Expired |
| US4038888A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 45 | Expired |
| US3971268A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US3956946A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US3946623A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US4089239A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US6300264A | Luminous glass | Chemistry; Metallurgy | 27 | Expired |
| US4027552A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US4143562A | Speed change gear | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US3971267A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US3946624A | Speed change gear | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6197710A | Luminous glass ceramics | Chemistry; Metallurgy | 15 | Expired |
| US4027551A | Speed change gear system | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4038887A | Speed change gear | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US3946622A | Speed change gear | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5708233A | Thermoelectric semiconductor material | Electricity | 11 | Expired |
| US7148164B2 | Low expansion transparent glass-ceramics, glass-ceramic substrate and optical waveguide element | Physics | 11 | Expired |
| US6204211A | Luminous glass ceramics | Chemistry; Metallurgy | 6 | Expired |
| US5578864A | Semiconductor material for use in thermoelectric conversion, thermoelectric converting method and thermoelectric device | Electricity | 4 | Expired |
| US7071132B2 | Low expansion transparent glass ceramics | Physics | 3 | Expired |
| US7396786B2 | Glass and glass substrate having high dielectric constant | Chemistry; Metallurgy | 3 | Expired |
| US7306879B2 | Lithium ion secondary cell | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.